package org.blindmandesign;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.    
 */

/**
 *
 * @author Nathan Bubna
 * @since javaQuery 1.0
 * @version $Id$
 */
public abstract class Node<N extends Node> {

    private Tag parent;

    public abstract NodeType getType();

    public N orphan() {
        return parent(null);
    }

    public N parent(Tag parent) {
        this.parent = parent;
        return (N)this;
    }

    public Tag parent() {
        return this.parent;
    }

    public Tag root() {
        if (isOrphan()) {
            return null;
        }
        return this.parent.root();
    }

    public boolean isOrphan() {
        return (parent == null);
    }

    public abstract boolean isEmpty();

    public abstract boolean matches(Node node);

    public abstract void render(StringBuilder s, Config config);

    public abstract void render(String indent, StringBuilder s, Config config);

    public String toString() {
        StringBuilder s = new StringBuilder();
        render(s, new Config());
        return s.toString();
    }

}
